Diagnostic library

Find an OBD2 code

Search the code from your scanner, then narrow the library by system, severity, or code family.

9,253 diagnostic guides

Sort

Find codes by symptomChoose what you notice to search matching code guides.

Rough idle or shakingVibration while stopped Hard to startLong cranking or no-start Engine stallsCuts out at idle or on the road Hesitates or loses powerSlow response when accelerating Battery light is onCharging system warning Harsh gear changesDelayed or rough shifting

A symptom can have several causes. Treat matching codes as clues and follow the diagnostic checks in each guide.

C · Chassis Clear all

Quick browse

Choose a vehicle system

Engine1049 Emissions515 Fuel1016 Sensors & Electronics2110 Transmission866 Electrical & Charging1797 Body & Restraints193 Chassis & Brakes479 Network & Communication1228

FiltersSeverity · family

Severity

All severities9253 Low priority305 Check soon8256 Urgent621

Code family

All families9253 P · Powertrain7353 B · Body193 C · Chassis479 U · Network1228

Vehicle coverage

These are generic OBD2 definitions. Exact make, model, engine, and year compatibility will appear after vehicle-fitment data is added.

Diagnostic codes

Showing 121–144 of 479

Most searched first

C0515Right Rear Wheel Speed Sensor A Circuit HighCheck soonChassis & Brakes45–120 minutes for initial diagnosisC0515 concerns right rear wheel speed sensor a circuit high. Learn what this fault indicates and where to begin diagnosis.C0516Right Rear Wheel Speed Sensor A Intermittent/ErraticCheck soonChassis & Brakes45–120 minutes for initial diagnosisC0516 concerns right rear wheel speed sensor a intermittent/erratic. Learn what this fault indicates and where to begin diagnosis.C0517Right Rear Wheel Speed Sensor A CorrelationCheck soonChassis & Brakes45–120 minutes for initial diagnosisC0517 concerns right rear wheel speed sensor a correlation. Learn what this fault indicates and where to begin diagnosis.C0518Left Front Wheel Speed Sensor - MechanicalCheck soonChassis & Brakes45–120 minutes for initial diagnosisC0518 concerns left front wheel speed sensor - mechanical. Learn what this fault indicates and where to begin diagnosis.C0519Right Front Wheel Speed Sensor - MechanicalCheck soonChassis & Brakes45–120 minutes for initial diagnosisC0519 concerns right front wheel speed sensor - mechanical. Learn what this fault indicates and where to begin diagnosis.C051ALeft Rear Wheel Speed Sensor - MechanicalCheck soonChassis & Brakes45–120 minutes for initial diagnosisC051A concerns left rear wheel speed sensor - mechanical. Learn what this fault indicates and where to begin diagnosis.C051BRight Rear Wheel Speed Sensor - MechanicalCheck soonChassis & Brakes45–120 minutes for initial diagnosisC051B concerns right rear wheel speed sensor - mechanical. Learn what this fault indicates and where to begin diagnosis.C051CMulti-axis Acceleration Sensor Module A Range/PerformanceCheck soonChassis & Brakes45–120 minutes for initial diagnosisC051C concerns multi-axis acceleration sensor module a range/performance. Learn what this fault indicates and where to begin diagnosis.C051DMulti-axis Acceleration Sensor Module A Missing CalibrationCheck soonChassis & Brakes45–120 minutes for initial diagnosisC051D concerns multi-axis acceleration sensor module a missing calibration. Learn what this fault indicates and where to begin diagnosis.C051EMulti-axis Acceleration Sensor Module A Intermittent/ErraticCheck soonChassis & Brakes45–120 minutes for initial diagnosisC051E concerns multi-axis acceleration sensor module a intermittent/erratic. Learn what this fault indicates and where to begin diagnosis.C051FMulti-axis Acceleration Sensor Module A CorrelationCheck soonChassis & Brakes45–120 minutes for initial diagnosisC051F concerns multi-axis acceleration sensor module a correlation. Learn what this fault indicates and where to begin diagnosis.C0520Multi-axis Acceleration Sensor Module ACheck soonChassis & Brakes45–120 minutes for initial diagnosisC0520 concerns multi-axis acceleration sensor module a. Learn what this fault indicates and where to begin diagnosis.C0521Multi-axis Acceleration Sensor Module B Range/PerformanceCheck soonChassis & Brakes45–120 minutes for initial diagnosisC0521 concerns multi-axis acceleration sensor module b range/performance. Learn what this fault indicates and where to begin diagnosis.C0522Multi-axis Acceleration Sensor Module B Missing CalibrationCheck soonChassis & Brakes45–120 minutes for initial diagnosisC0522 concerns multi-axis acceleration sensor module b missing calibration. Learn what this fault indicates and where to begin diagnosis.C0523Multi-axis Acceleration Sensor Module B Intermittent/ErraticCheck soonChassis & Brakes45–120 minutes for initial diagnosisC0523 concerns multi-axis acceleration sensor module b intermittent/erratic. Learn what this fault indicates and where to begin diagnosis.C0524Multi-axis Acceleration Sensor Module B CorrelationCheck soonChassis & Brakes45–120 minutes for initial diagnosisC0524 concerns multi-axis acceleration sensor module b correlation. Learn what this fault indicates and where to begin diagnosis.C0525Multi-axis Acceleration Sensor Module BCheck soonChassis & Brakes45–120 minutes for initial diagnosisC0525 concerns multi-axis acceleration sensor module b. Learn what this fault indicates and where to begin diagnosis.C0526Steering Angle Sensor ModuleUrgentChassis & Brakes45–120 minutes for initial diagnosisC0526 concerns steering angle sensor module. Learn what this fault indicates and where to begin diagnosis.C0527Steering Angle Sensor Module MechanicalUrgentChassis & Brakes45–120 minutes for initial diagnosisC0527 concerns steering angle sensor module mechanical. Learn what this fault indicates and where to begin diagnosis.C0528Steering Angle Sensor Module Range/PerformanceUrgentChassis & Brakes45–120 minutes for initial diagnosisC0528 concerns steering angle sensor module range/performance. Learn what this fault indicates and where to begin diagnosis.C0529Steering Angle Sensor Module Missing CalibrationUrgentChassis & Brakes45–120 minutes for initial diagnosisC0529 concerns steering angle sensor module missing calibration. Learn what this fault indicates and where to begin diagnosis.C052ASteering Angle Sensor Module CorrelationUrgentChassis & Brakes45–120 minutes for initial diagnosisC052A concerns steering angle sensor module correlation. Learn what this fault indicates and where to begin diagnosis.C052BABS Pump Motor Control Range/PerformanceCheck soonChassis & Brakes45–120 minutes for initial diagnosisC052B concerns abs pump motor control range/performance. Learn what this fault indicates and where to begin diagnosis.C052CABS Pump Motor Control Circuit/OpenCheck soonChassis & Brakes45–120 minutes for initial diagnosisC052C concerns abs pump motor control circuit/open. Learn what this fault indicates and where to begin diagnosis.